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21 Most Epic Moments From Our iHeartRadio Music Festivals Through The Years

We can't wait to see what 2015 brings!

The 2011 iHeartRadio Music Festival was the first year of what has since become an epic annual event. The Black Eyed Peas opened the show, and it was pretty incredible to see a bona-fide headliner (They performed at the SuperBowl!) open the entire festival.

Taylor Swift performed at the 2012 iHeartRadio Music Festival - one month before the release of her record-breaking album, RED. She performed the album's first single, "We Are Never Getting Back Together," setting the stage for the banner year she was about to have.

It's near impossible to mention the 2012 iHeartRadio Music Festival without acknowledging Green Day's meltdown moment. Billie Joe Armstrong told the festival crowd, " I'm not f***ing Justin Bieber, motherf***ers!" before smashing his guitar, throwing up a middle finger and walking off the stage. He checked into a rehab facility days later.

One of the most talked-about, blogged about, and laughed about moments in iHeartRadio Music Festival history happened backstage in 2012 when Flava Flav accidentally mistook Miley Cyrus for Gwen Stefani. Check out the video!

The next night, P!nk opened the show with a high-flying performance that was part mouth-dropping circus acrobatic act, part rock show, part lesson in vocal dexterity. She sang flawlessly while suspended upside down from the rafters - all this while her baby slept backstage. And that was Saturday's opening act that year.

Pitbull's 2012 iHeartRadio Music Festival closing performance was awesome when it happened, but what's even more epic is that it will live on in song for eternity. In his song "Hope We Meet Again" featuring Chris Brown from his album Global Warming, Mr. 305 raps, "One thing's for certain, two things for sure/
iHeartRadio, I close show."

At the 2013 iHeartRadio Music Festival, Queen, Adam Lambert and Fun. performed "Somebody To Love" and "Fat Bottomed Girls" together during Queen + Adam Lambert's night 1 closing set, and it was one of the most talked-about moments of the year. Brian May later said the iHeartRadio Music Festival performance was the catalyst that ignited the idea for the Queen + Adam Lambert tour.

One of the biggest moments in the history of the iHeartRadio Music Festival has to be Paul McCartney's second-night opening set at the 2013 show. That's right, we got a Beatle, and technically, he opened for Justin Timberlake.